Disappearing-propeller device for boats



A. D. MAcLEAN.

DISAPPEARING PROPELLER DEVICE FOR BOATS.

APPLICATION FILED FEB. 5,192].

Patented July 26, 1921.

Inuenrov:

A.D.Mac Lean UNITED STATES PATENT OFFICE.

ANDREW DYAS MAOLEAN, OF TORONTO, ONTARIO, CANADA.

Specification of Letters Patent.

Patented July 26, 1921.

Application filed february 5, 1921. Serial No. 442,802.

the protecting skeg of the propeller striking an obstruction and the object of the invention is to provide means for reversing the boat when the propeller is in the drawn up position.

My invention consists of disappearing propeller devices constructed and arranged substantially as hereinafter more particularly described and illustrated in the accompanying' drawing in which:

Figure 1 represents a longitudinal sectionv through a boat showing thereto, and

Fig. 2 is a plan view thereof showing the propeller casing in section.

Like characters of reference indicate corresponding parts in the different views.

1 is the boat. 2 is the keel thereof. 3 is the engine. 4 is the propeller shaft provided with thenniversal joint 5. 6 is the propeller casing, having the forwardflume portion 7 and the outwardly flared main portion 8 terminating in a suitably curved after end 9. A water dividing member 10 is integrally formed on the inside of the after end of the casing for dividing the rearwardly moving water from the propeller and directing it into two streams and to direct them forwardly.

l1 is'the propeller. 12 is the propeller skeg suitably secured to or formed on the link 13. The rear end of the link 13 is pivotally connected to a sliding collar 14; on the propeller shaft and the forward end secured to the pin 15 of the operating lever 16 which is situated exteriorly of the casing. 17 is a stuffing boX at the forward end of the propeller casing through which the shaft extends.

The operation of the device is as follows:

When the skeg 12 strikes an obstruction the propeller and propeller shaft are forced up into the casing 6 and thus the rearwardly moving water from the propeller will be my device applied forced against the curved surface of the after end of the casing and deflected by the dividing member 10 into two streams and directed in the forward direction, thus causing the boat to reverse instead of going in a forward direction as would occur when the propeller is down.

If it is desired to reverse the boat under ordinary circumstances, other than in a case of emergency, it is only necessary to pull up the lever 16 which will draw the propeller and propeller shaft up into the casing and thus the boat will reverse.

It is to be understood that I make no claim to the actual means for drawing the propeller up into the casing, my invention being the particular construction. of the casing to provide means for reversing the boat.

What I claim as my invention is:

1. In disappearing propeller devices for boats, the combination with the propeller, of a propeller casing open at thebottom said casing having a forward flume portion, and an outwardly flaring main portion terminating in a suitably curved after end causing the rearwardly moving water from the propeller to be directed in a forward direction for reversing the boat upon the propeller being drawn up into the casing.

2. In disappearing propeller devices for boats, the combination with the propeller, of a propeller casing open at the bottom, said casing having a forward flume portion, and an outwardly flaring main portion terminating in a suitably curved after end and means on the after end for dividing the rearwardly moving water from the propeller and direct ing it in independent streams in a forward direction for reversing the boat, upon the propeller being drawn up into the casing.

3. In disappearing propeller devices for boats, the combination with the propeller, of a propeller casing open at the bottom, said casing having a forward fiume portion and an outwardly flaring main portion terminating in a suitably curved after end, and a suitably curved dividing member formed on the inside of the after end of the casing and integrally therewith for dividing the rear wardly moving water from the propeller and directing it in independent streams in a forward dlreetion for reversing the boat upon the propeller being drawn up into the casing.

ANDREW DYAS MAoLEAN. 

